Rita has been diagnosed with her2 breast cancer, and is prescribed herceptin. the approach of basing a drug-prescribing decision on the results of a single-gene test is called:

c.) polymerase chain reaction

- "unlike the original dna fingerprinting method, dna profiling does not use restriction enzymes to cut the dna. instead it uses the polymerase chain reaction (pcr)? to produce many copies of specific str sequences. pcr is an automated procedure that generates lots of copies of a specific sequence of dna."

a symbiotic relationship with the mitochondria